Magnesium-free composite corrosion-resistant metallurgical chute pouring process

By using magnesium-free composite corrosion-resistant castable and layered casting and gradient curing processes, the problems of magnesium oxide impurity contamination and easy cracking of chutes were solved, achieving high-purity metal production and high-temperature resistance and erosion resistance of chutes.

CN122145113APending Publication Date: 2026-06-05CHIFENG YUNTONG NON FERROUS METAL CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CHIFENG YUNTONG NON FERROUS METAL CO LTD
Filing Date
2026-01-19
Publication Date
2026-06-05

AI Technical Summary

Technical Problem

In existing technologies, the traditional magnesium powder-water glass process results in severe magnesium oxide impurity contamination, affecting metal purity and equipment lifespan. At the same time, the lack of systematic process optimization for the entire sluice preparation process leads to easy cracking of the sluice and slag adhesion, increasing maintenance costs.

Method used

Magnesium-free composite corrosion-resistant castable, combined with layered casting and gradient curing processes, and through layered molding of the base layer, main body and dense surface layer and precise vibration control, combined with gradient curing system, a chute with high density and stability is prepared.

Benefits of technology

It completely eliminates the formation of magnesium oxide impurities, improves the purity of molten metal, reduces refining costs, reduces the risk of cracking, extends the service life of chutes and reduces cleaning difficulty, and has excellent high temperature resistance and erosion resistance.

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Abstract

The present application relates to metallurgical equipment manufacturing technical field, specifically to a kind of magnesium-free composite corrosion-resistant metallurgical chute pouring process, comprising the following steps: (1) pouring raw material preparation;(2) mold pretreatment;(3) preforming and layered pouring: using the magnesium-free composite corrosion-resistant pouring material as base layer pouring material and main body pouring material, first, the base layer pouring material with thickness of 5-8mm is laid to mold bottom;Subsequently, layered pouring main body pouring material, each layer pouring thickness is 30-50mm, each layer pouring is completed after 3-5min vibration;After main body pouring material pouring is completed, a layer of dense surface layer pouring material with thickness of 3-5mm is laid on surface, and vibration is carried out again for 1-2min;(4) gradient curing: ① room temperature static curing;② low temperature curing;③ medium temperature curing;④ natural cooling;(5) demolding and post-processing, to get finished product chute.The finished product chute prepared by the present application has temperature resistance temperature ≥ 1300℃, normal temperature compressive strength ≥ 85MPa, high temperature compressive strength ≥ 65MPa, and excellent high temperature resistance and erosion resistance.
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